CN211901032U

CN211901032U - Handheld fan

Info

Publication number: CN211901032U
Application number: CN202020485282.XU
Authority: CN
Inventors: 郭嘉鑫; 郭嘉怡; 郭斐; 吴卷庭; 吴诺兮
Original assignee: Dongguan Jiamushi Electronic Co ltd
Current assignee: Dongguan Bidanli Electronics Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-11-10
Anticipated expiration: 2030-04-03

Abstract

The utility model relates to a hand-held fan, in particular to the technical field of fans, the outer ring wall of a flow guide cover is provided with a flow guide curved surface with a structure of which the diameter is gradually increased from an air inlet to an air outlet; the inner ring wall at the upper end of the front shell is provided with a front shell inner curved surface with a structure of which the diameter is gradually reduced from the air inlet to the air outlet; the inner ring wall at the upper end of the rear shell is provided with a rear shell inner curved surface with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the back shell inner curved surface and the front shell inner curved surface are spliced into an air duct with the aperture at two ends smaller than the aperture in the middle. The mixed airflow sprayed out at high speed enables the wind to become soft and skin-friendly, and simultaneously ensures that the wind quantity is large enough; the structure is small and exquisite, and the portable carrying is easy.

Description

Handheld fan

Technical Field

The utility model relates to a fan technical field, concretely relates to handheld fan.

Background

At present, handheld fans on the market are single in appearance, free of innovation, large in size, capable of supplying air directionally, small in blowing area, large in local air volume, uneven in blowing to the face or on the body, and incapable of forming experience similar to natural wind.

The traditional fan is too high in price, single in function, not convenient enough, more prone to being used at home, and the main reason for lacking purchasing intention of users is urgent to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a handheld fan with reasonable design aiming at the defects and shortcomings of the prior art, the mixed air flow sprayed out at high speed enables the wind to become soft and close to the skin, and simultaneously, the enough large wind quantity is ensured; the structure is small and exquisite, and the portable carrying is easy.

In order to achieve the above purpose, the utility model adopts the following technical proposal: the fan comprises a fan shell, a key, a motor, a circuit board, an oblique flow supercharging impeller and a lithium battery; the fan shell consists of a flow guide cover, a front shell, a rear shell and a handle tail cover; the front shell and the rear shell are buckled and connected, the air guide sleeve is inserted and buckled at an air outlet in the upper end of the front shell, the lower end of an integral body formed by buckling the front shell and the rear shell is a handle, and the tail end of the handle is buckled with a handle tail cover; the motor is inserted and fastened in the upper end of the front shell, an output shaft of the motor is connected with an oblique flow supercharging impeller, the oblique flow supercharging impeller is arranged in the upper end of the rear shell, the button is electrically connected with the motor through a circuit on a circuit board, the circuit board is embedded and fixed at the upper end position inside the handle, and the button is arranged in the shell wall of the front shell in a penetrating way; the lithium battery is electrically connected with the motor through a circuit on the circuit board, and is embedded in the handle and positioned below the circuit board; the outer ring wall of the air guide sleeve is provided with an air guide curved surface with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the inner ring wall at the upper end of the front shell is provided with a front shell inner curved surface with a structure of which the diameter is gradually reduced from the air inlet to the air outlet; the inner ring wall at the upper end of the rear shell is provided with a rear shell inner curved surface with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the back shell inner curved surface and the front shell inner curved surface are spliced into an air duct with the aperture at two ends smaller than the aperture in the middle.

Further, the motor is a high-torque motor.

Furthermore, a plurality of strip-shaped guide vanes are integrally formed at the air outlet of the inner ring wall at the upper end of the front shell.

Furthermore, a strip-shaped grid is clamped at the position of an air inlet at the upper end of the rear shell.

Furthermore, a handle tail cover is connected with a hand-held rope in a penetrating way.

Furthermore, the circuit board is connected with a charging interface, the charging interface is clamped in the shell wall of the rear shell, and the charging interface is electrically connected with the lithium battery through a circuit of the circuit board.

After the structure is adopted, the beneficial effects of the utility model are that: the utility model provides a hand-held fan, the mixed air flow sprayed out at high speed makes the wind soft and skin-friendly, and simultaneously ensures that the wind quantity is large enough; the structure is small and exquisite, and the portable carrying is easy.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a sectional view taken along line a-a in fig. 1.

Fig. 3 is an exploded view of the present invention.

Fig. 4 is an assembly view of the present invention.

Fig. 5 is a cross-sectional view of the middle dome of the present invention.

Fig. 6 is a schematic structural view of the diagonal flow supercharging impeller of the present invention.

Fig. 7 is a cross-sectional view of the middle rear housing of the present invention.

Fig. 8 is a schematic structural diagram of the middle front shell of the present invention.

Fig. 9 is a cross-sectional view of the front middle shell of the present invention.

Description of reference numerals:

the device comprises a guide cover 1, a guide curved surface 1-1, a guide cover buckle 1-2, a front shell inner curved surface 2-1, a long strip-shaped guide vane 2-2, a front shell buckle 2-3, a clamping hook 2-4, a button 3, a motor 4, a circuit board 5, a charging interface 5-1, an oblique flow supercharging impeller 6, a rear shell 7, a rear shell inner curved surface 7-1, a strip-shaped grid 7-2, a clamping groove 7-3, a lithium battery 8, a handle tail cover 9 and a portable rope 10.

The specific implementation mode is as follows:

the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 9, the following technical solutions are adopted in the present embodiment: the fan comprises a fan shell, a key 3, a motor 4, a circuit board 5, an oblique flow supercharging impeller 6 and a lithium battery 8; the fan shell consists of a flow guide cover 1, a front shell 2, a rear shell 7 and a handle tail cover 9; the front shell 2 and the rear shell 7 are buckled and connected (a plurality of front shell buckles 2-3 are integrally formed on the rear ring surface of the upper end of the front shell 2, a plurality of clamping grooves 7-3 hooked with the front shell buckles 2-3 are integrally formed on the front ring surface wall of the upper end of the rear shell 7), the guide cover 1 arranged in a circular arc shape is inserted at the air outlet position in the upper end of the front shell 2, the outer end surface of the guide cover 1 is flush with the air outlet end part of the front shell 2 (a plurality of guide cover buckles 1-2 are integrally formed at the inner end of the guide cover 1, a plurality of clamping hooks 2-4 hooked with the guide cover buckles 1-2 are integrally formed on the inner ring wall of the upper end of the front shell 2, the lower end of the whole formed by buckling the front shell 2 and the rear shell 7 is a handle (the air inlet of the rear shell 7 is obliquely arranged at a certain angle with the handle, or is arranged in parallel, the air outlet of the front shell 2 is obliquely arranged at a, or parallel arrangement), the tail end of the handle is buckled with a handle tail cover 9, and a hand rope 10 is connected on the handle tail cover 9 in a penetrating way; the large-torque motor 4 is inserted and fastened in the upper end of the front shell 2, an output shaft of the motor 4 is connected with an oblique flow supercharging impeller 6 (the large-torque motor 4 is provided with the oblique flow supercharging impeller 6, wind resistance and friction force inside an air duct are overcome, wind is blown farther, the oblique flow supercharging impeller 6 is arranged in the upper end of the rear shell 7, a bar-shaped grid 7-2 (the safety is ensured and the appearance is improved) is clamped at a wind inlet position at the upper end of the rear shell 7, the key 3 is electrically connected with the motor 4 through a circuit on a circuit board 5 (the circuit is provided with a speed regulating module, the key 3 can regulate the rotating speed of the motor 4 through the speed regulating module), the circuit board 5 is embedded and fixed at the upper end position inside the handle, the circuit board 5 is connected with a charging interface 5-1, the charging interface 5-1 is clamped in the shell wall of the rear shell 7, and the charging interface 5-1 is electrically, the key 3 is arranged in the shell wall of the front shell 2 in a penetrating way; the lithium battery 8 is electrically connected with the motor 4 through a circuit on the circuit board 5, and the lithium battery 8 is embedded in the handle and positioned below the circuit board 5; the outer ring wall of the air guide sleeve 1 is provided with an air guide curved surface 1-1 with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the inner ring wall at the upper end of the front shell 2 is provided with a front shell inner curved surface 2-1 with a structure of which the diameter is gradually reduced from an air inlet to an air outlet, and a plurality of strip-shaped guide vanes 2-2 (used for increasing the air flow speed of outlet air) are integrally formed at the positions of the air outlet on the front shell inner curved surface 2-1; the inner ring wall at the upper end of the rear shell 7 is provided with a rear shell inner curved surface 7-1 with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the rear shell inner curved surface 7-1 and the front shell inner curved surface 2-1 are spliced into an air duct with the apertures at two ends smaller than the aperture in the middle, according to the wall attachment benefit of fluid, after the air flow is guided by the air guide sleeve 1 with the flow guide curved surface 1-1 and the inner wall of the front shell inner curved surface 2-1, the air flow sprayed at high speed can form cross mixing at a short distance from the air outlet, so that the air becomes soft and skin-friendly, the air volume is ensured to be large enough, and the air flow is blown up and cannot feel uncomfortable, and is completely the experience of natural wind.

The working principle of the specific embodiment is as follows: an air channel is formed by an inner cavity formed by buckling a rear shell 7, a front shell 2 and a flow guide cover 1, a lithium battery 8 provides electric energy for the motor 4 to work, the motor 4 drives an oblique flow supercharging impeller 6 to rotate, the oblique flow supercharging impeller 6 introduces air flow into the air channel from an air inlet in the direction indicated by an arrow in figure 2, and according to the wall attachment benefit of fluid, after the air flow is guided by a curved surface 2-1 and a curved flow guide surface 1-1 in the front shell, the high-speed sprayed air flow can form cross mixed air flow at a position close to an air outlet, so that the air becomes soft and skin-friendly.

After adopting above-mentioned structure, this embodiment's beneficial effect is as follows:

1. through fluid simulation calculation, the oblique flow supercharging impeller 6 is applied, the impeller is large in air pressure and large in load, so that a large-torque motor which is larger than the original motor is matched, the air pressure is greatly increased, and because the air pressure is greatly increased, the wind resistance and the friction force in an air duct can be overcome, and the air can be blown farther;

2. the periphery of the air guide sleeve is provided with an inward-bent air guide curved surface 1-1, so that air flow can achieve pressurization and flow guide effects, according to the wall attachment benefit of fluid, the air flow sprayed out at a high speed can form cross mixing with the air flow attached to the wall on the inward-bent surface (the inward-bent curved surface 2-1) inside the front shell 2 at a position short of an air outlet, so that the air becomes soft and skin-friendly, the air volume is ensured to be large enough, the air flow is blown up without being uncomfortable, and the experience of natural wind is completely realized;

3. the air outlet is designed to be annularly extruded to discharge air (formed by the trend of reducing the aperture formed by the flow guide curved surface 1-1 and the front shell inner curved surface 2-1), the wind speed is higher, and the wind power is stronger.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. A hand-held fan comprises a fan shell, a key (3), a motor (4), a circuit board (5), an oblique flow supercharging impeller (6) and a lithium battery (8); the fan shell consists of a flow guide cover (1), a front shell (2), a rear shell (7) and a handle tail cover (9); the front shell (2) is buckled and connected with the rear shell (7), the air guide sleeve (1) is inserted and buckled at an air outlet in the upper end of the front shell (2), the lower end of a whole formed by buckling the front shell (2) and the rear shell (7) is a handle, and the tail end of the handle is buckled with a handle tail cover (9); the motor (4) is inserted and fastened in the upper end of the front shell (2), an output shaft of the motor (4) is connected with an oblique flow supercharging impeller (6), the oblique flow supercharging impeller (6) is arranged in the upper end of the rear shell (7), the key (3) is electrically connected with the motor (4) through a circuit on a circuit board (5), the circuit board (5) is embedded and fixed at the upper end position inside the handle, and the key (3) is arranged in the shell wall of the front shell (2) in a penetrating mode; the lithium battery (8) is electrically connected with the motor (4) through a circuit on the circuit board (5), and the lithium battery (8) is embedded in the handle and positioned below the circuit board (5);

the method is characterized in that: the outer ring wall of the air guide sleeve (1) is provided with an air guide curved surface (1-1) with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the inner annular wall at the upper end of the front shell (2) is provided with a front shell inner curved surface (2-1) with a structure of which the diameter is gradually reduced from the air inlet to the air outlet; the inner ring wall at the upper end of the rear shell (7) is provided with a rear shell inner curved surface (7-1) with a structure of which the diameter is gradually increased from the air inlet to the air outlet; the rear shell inner curved surface (7-1) and the front shell inner curved surface (2-1) are spliced into an air duct with the aperture at two ends smaller than the aperture in the middle.

2. A hand held fan as claimed in claim 1, wherein: the motor (4) is a large-torque motor.

3. A hand held fan as claimed in claim 1, wherein: the air outlet of the inner ring wall at the upper end of the front shell (2) is integrally formed with a plurality of strip-shaped guide vanes (2-2).

4. A hand held fan as claimed in claim 1, wherein: and a strip-shaped grid (7-2) is clamped at the air inlet position at the upper end of the rear shell (7).

5. A hand held fan as claimed in claim 1, wherein: the handle tail cover (9) is connected with a hand-held rope (10) in a penetrating way.

6. A hand held fan as claimed in claim 1, wherein: the lithium battery charger is characterized in that a charging interface (5-1) is connected to the circuit board (5), the charging interface (5-1) is clamped in the shell wall of the rear shell (7), and the charging interface (5-1) is electrically connected with the lithium battery (8) through a circuit on the circuit board (5).